Overdrive with 3-Voice Distortion PUBLIC

Overdrive Circuit with 3-Voice Op-Amp Distortion

Overdrive circuit with 3-voice overdriven op-amp distortion. Controls Include: Input Gain, Tone, D1 Gain, D2 Gain, D3 Gain, and Volume. Frequency Range 16 Hz to 26 kHz with all controls at 50%, but extends in both directions with all controls > 50%. Suitable for 6/7/8-string guitar or 4/5/6-string bass. Voices refer to sound of different op-amps with different ranges. The Input and Output Stages involve clean high-fidelity op-amps. D1 is from BJT op-amps. D2 is from JFET-input op-amps. D3 is from MOSFET-input op-amps. Each distortion subcircuit involves a gain stage driving a buffer. Circuit is for stomp-box or rackmount projects. The batteries can be replaced by a regulated dual-polarity +-9V DC power-supply providing 50 to 100 mA current. And though simulator verified, treat the circuit as experimental. Breadboard test it before committing to a soldered build. House completed project in a grounded metal enclosure.